Filling material for teeth.



unseat museum, or LOUISVILLE/KENTUCKY, ass'tcnon 'ro LOUISVILLE,xnnrucxr. v

FILLING newsman ron 'rnn'rn.

Specification of Letters Patent.

lid Drawing;

To all whom it may concern: A

Be it known, that I, MIBSAK ,MAROUKE, citizen oi France residing atLouisville in the-county. of Jeilerson and State E entuo have inventedcertain new and use- I111 mproven'ients inFilling Materialsifor Teeth,of which the following is a specificationr This invention relates to animprovement in filling material for teeth. Heretofore in the art ofdentistry two well known processes of filling teeth with gold have beenresorted to, one-the common method of plugging'and the' more recentmethod of castmg or i nlaying. In the former method as is well knownmuch time is required ln'packing the gold in small quantities into thecav- ,or inlay ity and also the nece'ssity of so fashioning the. cavitythat the margins will overhang and form a. retaining wall' for thefilling. In the inlaying method, a form ofthe cavity is'taken-withsuitable wax'or plastic material; the form or impression is employed tomake'a m'atrii or mold in which the gold is castin correspondence, withthe cavity. The production of a material preferably gold which can befilled into the cavity as the primary form as distinguished from apattern and thereafter be temperedpr treated so that the replica of acavity in. metal is produced forinlaying in the, usualmanner.

It has long been regarded as desirable to fill a tooth ,cavity with asolid filling of gold orprecious metal 'in a manner similar to i andmixed 'with I age ofmercury and then triturated in a moror fillingmaterial therewn h it has been as? i tar, produces a finegrayish'alloyed form of certained thata very close compactsubstan thatnow practised-in connection with the ordinaryamalgamifillmg, whichlatter, is

quickly andaecurately placed in the cavity and there held by-overhangingwalls or. an choragex Thepresent invention also ,eontenmlates a materialwhich can be filled into a cavity,-

without overhanging walls, quickly and in a manner similar to thato'fplacing famal gamf-filli-ngs. without the use of a mullet, therebyproducing a solid inlay filling which can be cemented .1n any convenientmanner to the walls of the cavity. 7

After experiments and tests it has been ascertained'that' pure gold ifreduced to a fine powdered form by an acid treatment a relatively smallpercent present invention contemplates the powder. This mam m1 is abasic material representing the present in rention. f y In ,procurmg thegrayisi fillingpowder,

a convenient methodis the; of pllpltfltlqll, I An acid; bath- 1susuallyemployed for precipitating 'piir-,

now well known in the ari.

posesand the fine powdei'ed old So PF-i eipitated is now procurable in te open mar;

1mm LY r. nnlrz', 017- ket." The precipitate is-represented as of"? puregold in a finely powde red state. After the powdered gold has beenprocured ithas been found convenient to h eat the same with n view-ofconsolidating the mass but not to melt the same, and in thin conditionthere is added to the consolidated mass ofj'free particles, a percentageof nercury, It has been found that 20 dwt. of gold powder when mixedwith 4, dwt. of mercury and thoroughly stirred and .trit urated in adried condition results in the production of a gra ish powdered masswhich can be readily placed in capsules or bottles for future use.

When it is desired to use the material for filling, it is mixed withmercury in substantial proportions much as the now recoge nized amalgamfilling is mixed until the mass becomes more-or less plastic. Theenperfluo'usmercury" is then squeezed out through a chamois and theresultant prodnet is thenfilledin the ca vity conveniently the cavityhaving been" first lined with a ,layer of thin leaf gold. The fillingmass'is shaped to the desired con our to represent the destroyed part ofthewooth and 1s then removed so that the inlay thus formed representsatrue replica of the missing parts of the tooth. In this cor dition it1s'subjected to, dry heat conven ently an alcohol flame until themercury is evapcit 'ated leaving a solid inlay without any material orobjectionable shrinkage.

In this form the inlay is placed in the tooth and therecemented, thesurfaces being prop arly burnished in the usual manner. The inlay hasthe char actor of and is a gold hardness, and fineness;

filli: 1g of the proper Should an extra hard filling be desiredaprecipitated powdered silv :ror copper mayl in a manrle r similar tothat heretofore described. By employing the small percentage ofahighlyfdistilled mercury and treating -the various particles 'of tiepowdered gold be added to the powdered gold and treated solid andsatisfactory filling can be tiall prodixced. The owdered' substance isin color grayish an it has been found that it can berea'di'ly mixed withmercury for the purpose of tproducing a plastic mass for the fillingoperation. By the thorough mixing nd. trituration of the mercury withthe dried powdered gold each particle of the filling may be said to,becomposed of a large per cent. of pure gold and a small per cent.

;of mercuryand it is this dried grayish fill;

ing' powder which represents the discovery andinvention 'herein referredto;

While mercury preferably h'ghly distilled has been found very satisfact'ory for pretrea ting the powdered gold so that the 'materialma'ybeemployed .\vlieh dcsi1'ed, it

I istobe understood thathny othershbstance which would have theefi'ectof producing a substantially solid filling when em 'iloy'ed with thepowdered gold may be substituted therefor so that the terms employed inthe appended claimsare not intended asvlimitin the invention in thatparticular. g

aving thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is 1. A dried powdered substancesuitable for a fillin for teeth comprising finely divided gol particlesmixed with a relatively small amount of mercury.

2. A dried powdered substance suitable for filling teeth containing apowdered metallic filling substance associated with a relatively smallamount of mercury.

3. The method of producing a filling material for teeth consisting insubjecting a body of finely powdered gold to the action of heat, addingto the powderecLmass a relatively small amount of mercury and thoroughlytriturating the combined mass.

4. The method of producing a material for use in filling teethconsisting inadrli'ng to a body of dried finely powdered precious metalfilling n'iaterial' a relatively small amount of mercury andtrituratingthe mass to cause the mercury to come in contact with thevarious particles of the metal and maintaining the mass in a dried stateafter treatment.

In testimony whereof I hereunto affix my signature in the presence oftwo witnesses.

MISSAK MAROUKE.

VVitneSSes:

J. E. HU'ronINs, GUSTAV A. ELLERKAMP.

